- constructed or fitted so tightly as to be impervious to water: The ship had six watertight compartments.
- so devised or planned as to be impossible to defeat, evade, or nullify: a watertight contract; a watertight alibi.
Origin of watertight
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for watertight
Eight of the largest boilers are set in watertight compartments.
Before them was the watertight door, in which was set a large pane of quarsteel.Under Arctic Ice
They are heavily built, with good beam and watertight compartments.Life and sport in China
Oliver G. Ready
We might as well make our roof as watertight as we can before dark.Yorke The Adventurer
"The whole of the underbody of the outer envelope is watertight," he remarked.The Dreadnought of the Air
Percy F. Westerman
- not permitting the passage of water either in or outa watertight boat
- without loopholesa watertight argument
- kept separate from other subjects or influencesdifferent disciplines are often thought of in watertight compartments
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
Word Origin and History for watertight
Online Etymology Dictionary, © 2010 Douglas Harper